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You are watching: 2008 nissan altima spark plug gap

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I recently bought original spark plugs (NGK) for my 2012 altima and they were supposed to be gapped at the factory at 0.044. However, when I installed them I noticed that the car was rough idling and the engine was noisier than normal. I decided to check the gap and they were actually gapped at 0.041-42. I corrected the gap to 0.044 and the engine is running better. I then decided to run a little experiment and set the gap at 0.050 and the engine is even quieter. My question: would increasing the gap even more (like to 0.055) have any detrimental effects on the car (ignition system, coils, etc.)?Thanks.
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